EC 9 SIX WEEK TEST

Will the balloons ATTRACT or REPEL each other?

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• 

The buildup of electric charges is called . . .

• static electricity

• electric discharge

• electric charge

Static electricity can "jump" from the charged object to another object, causing . . .

• static cling (objects sticking together)

• electric discharge (and a shock!)

Two objects with LIKE static charges will

• attract each other
• even out in the end
• repel each other
• cause a spark

Rubbing a balloon on hair is an example of static charge build up created by....

• conduction
• friction
• induction
• hairduction

What happens when you touch a metal doorknob after rubbing your shoes on the carpet?

• The doorknob sends a burst of electric current into your body
• Millions of electrons go from your finger into the doorknob
• The doorknob sends millions of electrons into your finger
• our finger becomes negatively charged

The smallest unit of an element is

• An electron
• A proton
• A neutron
• An atom

A/an _________________ is an object that will allow electricity to flow through it.

• insulator
• conductor

A/an _________________ is a material that will not allow electricity to flow through it.

• insulator
• conductor

Which material is a conductor?

• glass
• aluminum
• wood